4 stars: Terrific game. But with the new update all my save data was wiped, along with hard earned gems. Thankfully any classes purchased with money are back, but it's still irritating to lose progress. Side note: The Transylvania family could use tweaking, many enemies can easily one shot you - I am VERY pleased with the prices drop, thank you!
3 stars: After spending more time on the game they added a basic cloud save that doesn't work very well, a couple of new dungeons to play, and some new classes. The prices on things are so high that you would have to spend dozens of hours to unlock the newest feature, or pay some money for the in game currency. Paying for the classes wouldn't be so bad if the cost to get gems wasn't so high.
2 stars: The game has potential to be fun even though it's clearly unfinished. What ruins it is the ludicrous monetization. I've played for 15 minutes and I've been prompted to watch ads more than 10 times. Had I watched them all, pretty much half the time I would have spent on the game would have been watching ads. You can watch an ad to x10 your end of run rewards, so basically if you don't watch it, you'll never make any progress in the game.
2 stars: Great card game but save games is broken and purchases are lost when you switch phones and/or uninstall game. Also lose all progress and cloud server doesn't save game. Contacted Dev and no response. Checked online and it's a common problem. It's shame because this is a great game.